you never know, lotsa funny things could've happened... in spinning to 4K, the crank could have stretched, causing it to grow from its normal 3.48" to 3.75 or more... and with the added stroke, the pistons had to go somewhere, so the bore enlarged to 4"... that would transform that weak little 305 to a 383 in no time. yeah, sure, and my trucks are all rust free too.
